The volume of a solid hemisphere is 19,404 cm3. Its total surface area (in cm2) is:
(Take π = )
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 4158
The volume of hemisphere = 2/3 × πr3
2/3 × πr3 = 19404
2/3 × 22/7 × r3 = 19404
r = 21
Total surface area of hemisphere = 3πr2.
= 3 × 22/7 × 21 × 21 = 4158.